a good track for learning javascript

As i had mentioned earlier in my previous post, javascript is quite important and as a web developer you should know javascript well.The problem however is with the appropriate technique to learn it.I found a technique which claims to be good.
how-to-learn-javascript-properly

I have started this course and i can say i'm seeing some progress, i'm through with the first two weeks.About the resources, i would recommend professional Js for web developers.

I've not finished the week 3 and 4 sections but i really look forward to evaluating whether my skills have increased.

The codeacademy course can be very boring especially if you've chosen to start with the web fundamentals.I chose to skip some sections, but took others which looked like good refreshers.Don't skip this track entirely, you can be surprised to learn things you didn't know.